Sound machine



FIG. 1 is a top perspective view of a sound machine;

FIG. 2 is another top perspective view of the sound machine;

FIG. 3 is a bottom perspective view of the sound machine;

FIG. 4 is a front view of the sound machine;

FIG. 5 is a rear view of the sound machine;

FIG. 6 is a top plan view of the sound machine; and,

FIG. 7 is a bottom plan view of the sound machine.

The elements shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a sound machine, as shown and described. 